Edge filter with a sharing architecture and related method for sharing the edge filter under a plurality of video standards

An edge filter with a sharing architecture, for filtering vertical edges or horizontal edges between decoded blocks, the edge filter comprising:

• an input unit, for receiving a plurality of first original pixels of a first decoded block and a plurality of second original pixels of a second decoded block;
• and
• a shared edge filter module, coupled to the input unit and supporting a plurality of video standards, the shared edge filter module comprising:
• a shared intermediate value generator, coupled to the input unit, for generating at least one shared intermediate value by making use of original pixels selected from the plurality of first original pixels and the plurality of second original pixels according to a coefficient rule of coefficients of the plurality of first original pixels and the plurality of second original pixels under a designated video standard;
• and
• a filtering unit, coupled to the shared intermediate value generator, for filtering the plurality of first original pixels and the plurality of second original pixels to generate a plurality of first filtered pixels and a plurality of second filtered pixels by reference to the coefficient rule;
• wherein at least two of the first filtered pixels and the second filtered pixels are derived from the shared intermediate value.